2nd month of Unauthorized Kindle Unlimited debit order

I've been trying to get assistance from FNB to report an authorized debit for 2 consecutive months to no avail. Last month I was told to fill in a form for credit dispute and would receive a new card. All that was done, but no card received or refund of the debited amount. Today I received a similar sms regarding a transaction that went through by the same company Kindle Unlmt. Tried calling FNB several times. One, the lady couldn't help me cause I was using a phone with 2 Sim cards... What nonsense it that... Tried again no answer after waiting for almost 10min. Couldn't get assistance when using the app... I'm at a loss now. I've been with FNB for more than 10years but their stunts are are making me reluctant to continue with this bank. How can they allow unauthorized debits to continue even after clients complain. Worse, you can't even reverse these on the app. Utter nonsense to say the least.